RESTORING CROPLAND PRODUCTIVITY AND PROFITABILITY IN NORTHERN ETHIOPIAN DRYLANDS AFTER NINE YEARS OF RESOURCE-CONSERVING AGRICULTURE

2015 ◽  
Vol 52 (2) ◽  
pp. 165-187 ◽  
Author(s):  
TESFAY ARAYA ◽  
JAN NYSSEN ◽  
BRAM GOVAERTS ◽  
FRÉDÉRIC BAUDRON ◽  
LOUISE CARPENTIER ◽  
...  
Keyword(s):  
Soil Fertility ◽  
Water Conservation ◽  
Crop Residue ◽  
Smallholder Farmers ◽  
Crop Productivity ◽  
Nutrient Loss ◽  
Sub Saharan Africa ◽  
Eastern Africa ◽  
Northern Ethiopia

SUMMARYLong-term in situ soil and water conservation experiments are rare in sub-Saharan Africa, particularly in Eastern Africa. A long-term experiment was conducted (2005–2013) on a Vertisol to quantify the impacts of resource-conserving agriculture (RCA) on runoff, soil loss, soil fertility and crop productivity and economic profitability in northern Ethiopia. Two RCA practices were developed from traditional furrow tillage practices: (i) derdero+ (DER+) and terwah+ (TER+). DER+ is a furrow and permanent raised bed planting system, tilled once at planting time by refreshing the furrow and 30% of crop residue is retained. TER+ is ploughed once at planting, furrows are made at 1.5 m intervals and 30% crop residue is retained. The third treatment was a conventional tillage (CT) with a minimum of three tillage operations and complete removal of crop residues. Wheat, teff, barley and grass pea crops were grown in rotation. Runoff, and soil and nutrient loss were measured in plastic sheet-lined collector trenches. Significantly different (P < 0.05) runoff coefficients (%) and soil losses (t ha−1) averaged over 9 yrs were 14 and 3, 22 and 11 and 30 and 17 for DER+, TER+ and CT, respectively. Significant improvements in crop yield and gross margin were observed after a period of three years of cropping This study demonstrated that RCA systems in semi-arid agro-ecosystems constitute a field rainwater conservation and soil fertility improvement strategy that enhances crop productivity and economic profitability. Adoption of RCA systems (DER+ and TER+) in the study area requires further work to improve smallholder farmers’ awareness on benefits, to guarantee high standards during implementation and to design appropriate weed management strategies.

scholarly journals Alternative Uses, in and off-Field Managements to Reduce Adverse Impact of Crop Residue Burning on Environment: A Review

2021 ◽  
pp. 100-118
Author(s):  
R. K. Naresh ◽  
S. S. Dhaliwal ◽  
M. S. Chandra ◽  
S. K. Malhotra ◽  
J. Harish ◽  
...  
Keyword(s):  
Soil Fertility ◽  
Crop Residue ◽  
Crop Residues ◽  
Smallholder Farmers ◽  
Cropping Systems ◽  
Field Studies ◽  
Crop Productivity ◽  
External Input ◽  
Nutrient Loss ◽  
Seed Crops

Residues of various crops are considered nuisance but they can be helpful in increasing organic matter in soil and better cycling of nutrients in soil if managed properly. Better management and utilization of crop residues (CR) is necessary for better productivity and quality of crops. Sowing into loose residues is the major issue in adapting the drill sowing method. Apart from the higher quantity of rice (192.82 mt) and wheat residue (120.70 mt), the residue of sorghum, maize, barley, chickpea, groundnut, rapeseed, mustard, sugarcane trash, potato, soybean, sunflower and some other minor cereals also contribute substantially towards total amount of about 462.93 million tonnes in India in 1997-98. Three quarters of the total residue is produced by rice, wheat and oil seed crops with remaining quarter coming from sugarcane and sorghum. Crop residue is important component of low external input for sustainable agriculture without sacrificing productivity. The crop residues left behind is considered as burden forcing farmers to burn them as cheap and easiest method with mistaken belief that it enhances the soil fertility and helps in controlling weeds, insects and pests. Different studies revealed that burning of residues causes air pollution and nutrient loss in soil. Improvements in soil properties and the sustainability in crop productivity could be achieved if CR are proper managed. Long-term field studies at sites carefully selected with variations in temperature, moisture, soil mineralogy and management of agricultural residues representing various cropping systems across regions should be identified and sustained. The possible benefits of crop residues for the improvement of degrading soil fertility would be completely understood only then. Owing to the competing requirements for such biomass for feed, fuel or building material, smallholder farmers typically find it difficult to maintain a soil cover for crop residue or a cover crop.

scholarly journals Gliricidia Agroforestry Technology Adoption Potential in Selected Dryland Areas of Dodoma Region, Tanzania

Agriculture ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. 306
Author(s):  
Martha Swamila ◽  
Damas Philip ◽  
Adam Meshack Akyoo ◽  
Stefan Sieber ◽  
Mateete Bekunda ◽  
...  
Keyword(s):  
Soil Fertility ◽  
Crop Yields ◽  
Smallholder Farmers ◽  
Mineral Fertilizer ◽  
Economic Benefits ◽  
Environmental Benefits ◽  
Production Costs ◽  
Sub Saharan Africa ◽  
Agroforestry Technology

Declining soil fertility is one of the major problems facing producers of field crops in most dryland areas of Sub-Saharan Africa. In response to the declining soil fertility, extensive participatory research has been undertaken by the World Agroforestry (ICRAF) and smallholder farmers in Dodoma region, Tanzania. The research has, amongst others, led to the development of Gliricidia agroforestry technology. The positive impact of Gliricidia intercropping on crop yields has been established. However, information on farmers’ willingness and ability to adopt the Gliricidia agroforestry technology on their farms is limited. This study predicts the adoption of Gliricidia agroforestry and conventional mineral fertilizer use technology. Focus Group Discussions (FGDs) were conducted with groups of farmers, purposively selected based on five sets of criteria: (i) at least 2 years of experience in either trying or using Gliricidia agroforestry technology, (ii) at least 1 year of experience in either trying or using the mineral fertilizer technology (iii) at least 10 years of living in the study villages, (iv) the age of 18 years and above, and (v) sex. The Adoption and Diffusion Outcome Prediction Tool (ADOPT) was used to predict the peak adoption levels and the respective time in years. A sensitivity analysis was conducted to assess the effect of change in adoption variables on predicted peak adoption levels and time to peak adoption. The results revealed variations in peak adoption levels with Gliricidia agroforestry technology exhibiting the highest peak of 67.6% in 12 years, and that the most influential variable to the peak adoption is the upfront cost of investing in Gliricidia agroforestry and fertilizer technologies. However, in Gliricidia agroforestry technology most production costs are incurred in the first year of project establishment but impact the long term biophysical and economic benefits. Moreover, farmers practicing agroforestry technology accrue environmental benefits, such as soil erosion control. Based on the results, it is plausible to argue that Gliricidia agroforestry technology has a high adoption potential and its adoption is influenced by investment costs. We recommend two actions to attract smallholder farmers investing in agroforestry technologies. First, enhancing farmers’ access to inputs at affordable prices. Second, raising farmers’ awareness of the long-term environmental benefits of Gliricidia agroforestry technology.

scholarly journals Impact of Soil Fertility Improving Trees on Crop Productivity and Farmer Wealth in Zambia

2017 ◽  
Vol 6 (3) ◽  
pp. 14
Author(s):  
Elias Kuntashula
Keyword(s):  
Soil Fertility ◽  
Field Experiments ◽  
Resource Constraints ◽  
Smallholder Farmers ◽  
Information Access ◽  
Crop Productivity ◽  
Sub Saharan Africa ◽  
Wealth Creation ◽  
Maize Productivity ◽  
Sub Saharan

There has been low uptake of soil fertility improving tree technologies that have been promoted as alternatives to the costly inorganic fertiliser among the poor resource farmers of Sub Saharan Africa. This is surprising given that the majority of smallholder farmers cannot afford inorganic fertilisers. Are these technologies effective? Using data collected in 2013 from 1,231 households across six districts of Zambia, this study showed that the tree technologies increased maize productivity. However, increases in maize productivity were less than those obtained from controlled on-station and field experiments where the technologies could double or more than double maize productivity according to literature. The technologies capacity to marginally contribute to wealth creation was confirmed. Socioeconomic constraints including labour, information access, land and credit need to be tackled for the technologies to give maximum benefits. Research on fertiliser trees should therefore be redirected towards the discovery of such resource constraints saving technologies. 

scholarly journals CLIMATE VARIABILITY AND CHANGE: FARMER PERCEPTIONS AND UNDERSTANDING OF INTRA-SEASONAL VARIABILITY IN RAINFALL AND ASSOCIATED RISK IN SEMI-ARID KENYA

2011 ◽  
Vol 47 (2) ◽  
pp. 267-291 ◽  
Author(s):  
K. P. C. RAO ◽  
W. G. NDEGWA ◽  
K. KIZITO ◽  
A. OYOO
Keyword(s):  
Climate Variability ◽  
Crop Production ◽  
Smallholder Farmers ◽  
Crop Productivity ◽  
General Tendency ◽  
Climate Variability And Change ◽  
Negative Impacts ◽  
Probabilistic Nature ◽  
Semi Arid

SUMMARYThis study examines farmers’ perceptions of short- and long-term variability in climate, their ability to discern trends in climate and how the perceived trends converge with actual weather observations in five districts of Eastern Province in Kenya where the climate is semi-arid with high intra- and inter-annual variability in rainfall. Field surveys to elicit farmers’ perceptions about climate variability and change were conducted in Machakos, Makueni, Kitui, Mwingi and Mutomo districts. Long-term rainfall records from five meteorological stations within a 10 km radius from the survey locations were obtained from the Kenya Meteorological Department and were analysed to compare with farmers’ observations. Farmers’ responses indicate that they are well aware of the general climate in their location, its variability, the probabilistic nature of the variability and the impacts of this variability on crop production. However, their ability to synthesize the knowledge they have gained from their observations and discern long-term trends in the probabilistic distribution of seasonal conditions is more subjective, mainly due to the compounding interactions between climate and other factors such as soil fertility, soil water and land use change that determine the climate's overall influence on crop productivity. There is a general tendency among the farmers to give greater weight to negative impacts leading to higher risk perception. In relation to long-term changes in the climate, farmer observations in our study that rainfall patterns are changing corroborated well with reported perceptions from other places across the African continent but were not supported by the observed trends in rainfall data from the five study locations. The main implication of our findings is the need to be aware of and account for the risk during the development and promotion of technologies involving significant investments by smallholder farmers and exercise caution in interpreting farmers’ perceptions about long-term climate variability and change.

scholarly journals Effect of Different Rates of Poultry Manure and Bio-Slurry on the Yield of Solanum aethiopicum Shum

2018 ◽  
Vol 10 (4) ◽  
pp. 158 ◽  
Author(s):  
Mary Nanyanzi ◽  
Elizabeth Balyejusa Kizito ◽  
Michael Masanza ◽  
Godfrey Sseruwu ◽  
Moses Makoma Tenywa
Keyword(s):  
Soil Fertility ◽  
Block Design ◽  
Poultry Manure ◽  
Crop Productivity ◽  
Application Rate ◽  
Sub Saharan Africa ◽  
Vegetable Production ◽  
Solanum Aethiopicum ◽  
Randomized Block Design ◽  
Poor Soil

Poor soil fertility remains the major cause of low crop productivity on smallholder farms that are engaging in vegetable production in sub-Saharan Africa. Appropriate soil fertility regimes are therefore critical for improving crop productivity. Its yield has remained low mainly due to poor soil fertility. A field experiment in two different seasons was planted in a Completely Randomized Block Design using Solanum aethiopicum Shum (Nakati). The treatments were 3 sole fertilizer options applied at the following rates: poultry manure and bio-slurry manure at 5, 10, 15, 20, 25 and 30 t ha-1, NPK (25:5:5) at the recommend application rate for tomato which is a sister crop and a control without any fertilizer. Crop budgets were used to determine the economic optimum rates of both sole applications of manure and combinations of manure with NPK. The sole applications and showed significantly (p ≤ 0.05) increased the yield of S. aethiopicum compared with the control. The established biological optimum rates were at 24.19 t ha-1 and 21.51 t ha-1 for poultry manure and bio-slurry respectively. Using the crop budgets it was concluded that the established economic optimum rates were 20 t ha-1 and 10 t ha-1 for sole poultry manure and bio-slurry respectively. Recommendations for use of sole poultry manure and bio- slurry at the rate of 20 t ha-1 and 10 t ha-1 respectively were made.

scholarly journals DETERMINANTS OF THE DECISION TO ADOPT INTEGRATED SOIL FERTILITY MANAGEMENT PRACTICES BY SMALLHOLDER FARMERS IN THE CENTRAL HIGHLANDS OF KENYA

2009 ◽  
Vol 45 (1) ◽  
pp. 61-75 ◽  
Author(s):  
JAYNE MUGWE ◽  
DANIEL MUGENDI ◽  
MONICAH MUCHERU-MUNA ◽  
ROEL MERCKX ◽  
JONAS CHIANU ◽  
...  
Keyword(s):  
Soil Fertility ◽  
Management Practices ◽  
Smallholder Farmers ◽  
Household Head ◽  
Sub Saharan Africa ◽  
Full Time ◽  
Soil Fertility Management ◽  
Integrated Soil Fertility Management ◽  
Fertility Management ◽  
Central Highlands

SUMMARYDeclining soil fertility is a major cause of low per capita food production on smallholder farms of sub-Saharan Africa. This study attempted to provide an empirical explanation of the factors associated with farmers' decisions to adopt or not to adopt newly introduced integrated soil fertility management (ISFM) technologies consisting of combinations of organics and mineral fertilizer in Meru South district of the central highlands of Kenya. Out of 106 households interviewed, 46% were ‘adopters’ while 54% were ‘non-adopters’. A logistic regression model showed that the factors that significantly influenced adoption positively were farm management, ability to hire labour and months in a year households bought food for their families, while age of household head and number of mature cattle negatively influenced adoption. The implication of these results is that the adoption of ISFM practices could be enhanced through targeting of younger families where both spouses work on the farm full-time and food insecure households. It is also important to target farmers that lack access to other sources of soil fertility improvement. Examples include farmers that do not own cattle or those owning few and who, therefore, have limited access to animal manure.

scholarly journals Large Scale Demo Plot Trial Project of Potash Fertilization for Increased Yield and Profitability for Smallholder Soybean Fields in India

2019 ◽  
Vol 7 (2) ◽  
pp. 159-170
Author(s):  
Joachim B. Nachmansohn ◽  
Patricia Imas ◽  
Surinder K. Bansal
Keyword(s):  
Soil Fertility ◽  
Crop Production ◽  
Large Scale ◽  
Smallholder Farmers ◽  
Agricultural Practices ◽  
Crop Productivity ◽  
Fine Tuning ◽  
Soil Testing ◽  
Yield Increase ◽  
K Fertilization

Agriculture is the backbone of the Indian economy, in spite of concerned efforts towards industrialization in the last three decades. Therefore, the soil quality and fertility are the major factors in crop production. Declining soil fertility is one of the primary factors that directly affect crop productivity, and fertilizer-use is a key factor in order to keep soil fertility and productivity. A major factor in declining soil fertility is potassium (K) depletion, especially on smallholder farms where fertilization decisions are not based on regular soil testing. Most of the smallholder soybean producers do not have access and investment capacity to soil testing services. Therefore, there is a need to create K fertilizer recommendations based on empirically verified knowledge at India-specific scale. Such large-scale studies, in local filed conditions, are currently lacking. In order to bridge this gap, and generate proven set of directly applicable recommendations, a large-scale plot trial was launched; the Potash for Life (PFL) project. The study evaluated the K response in soybean when fertilizing with potash on K depleted soils in local variable field conditions. The aim was to (1) evaluate the effect and response consistency of K application on soybean yield, (2) to demonstrate to farmers the increased yield and profitability from K-inclusive fertilization regimes for this crop and give recommendations for transient yield increase, and (3) to raise the awareness among smallholder farmers about the importance of K fertilization. A comprehensive experiment was carried out in Madhya Pradesh (M.P.) and Maharashtra. The methodology was straight-forward; two identical plots side by side, with the only difference that one of them was fertilized with additional potash. The results showed a significant yield increase response from the potash application; the average yield increase was 244 kg ha-1 or 26 % in M.P., and 105 kg ha-1 or 36 % in Maharashtra. This entailed an average additional net profit of ₹ 6,681 INR ha-1 and ₹ 2,544 INR ha-1, in M.P. and Maharashtra respectively. It was concluded that the soil status of plant available K is significantly lower than the plant demand for soybean production in the two states, Consequently, K fertilization is necessary in order to improve agricultural practices and optimizing yields. Ultimately, following recommendations given in this study would allow farmers to generate additional profit, which could further allow them to invest in fine-tuning fertilizer practices through the means of soil testing.

scholarly journals Modelling smallholder farmers’ preferences for soil fertility management technologies in Benin: A stated preference approach

PLoS ONE ◽  
2021 ◽  
Vol 16 (6) ◽  
pp. e0253412
Author(s):  
Segla Roch Cedrique Zossou ◽  
Patrice Ygue Adegbola ◽  
Brice Tiburce Oussou ◽  
Gustave Dagbenonbakin ◽  
Roch Mongbo
Keyword(s):  
Soil Fertility ◽  
Agricultural Development ◽  
Latent Class ◽  
Local Economic Development ◽  
Stated Preference ◽  
Smallholder Farmers ◽  
Latent Class Models ◽  
Sub Saharan Africa ◽  
Soil Fertility Management ◽  
Sub Saharan

The decline of soil fertility is a major constraint which results in lower levels of crop productivity, agricultural development and food security in Sub-Saharan Africa. This study is the first to perform a focalized investigation on the most interesting technological profiles to offer to each category of producers in Benin agricultural development hubs (ADHs) using the stated preference method, more precisely, the improved choice experiment method. The investigation focused on 1047 sampled plots from 962 randomly selected producers in villages of the Smallholder Agricultural Productivity Enhancement Program in Sub-Saharan Africa of the ADHs. An analysis of the experimental choice data with the endogenous attribute attendance and the latent class models was carried out to account for the attribute non-attendance phenomenon and the heterogeneity of the producers’ preferences. However, three classes of producer with different socio-economic, demographic, and soil physicochemical characteristics were identified. Thus, the heterogeneity of preferences was correlated with the attributes linked to the cost, sustainability, and frequency of plot maintenance. All producers, regardless of the ADHs, had a strong attachment to accessibility of technologies with short time restoration of soil fertility, and the ability to obtain additional benefits. These latest attributes, added to that relating to cost, tended to have a low probability of rejection in the decision-making process. These results have implications for local decision-makers facing the complex problem of resolving land degradation and local economic development challenges. The generalizability of these findings provides useful insight and direction for future studies in Sub-Saharan Africa.

Determinants of smallholder farmers’ adoption of short-term and long-term sustainable land management practices

2020 ◽  
pp. 1-13 ◽  
Author(s):  
Moses Mosonsieyiri Kansanga ◽  
Isaac Luginaah ◽  
Rachel Bezner Kerr ◽  
Laifolo Dakishoni ◽  
Esther Lupafya
Keyword(s):  
Land Management ◽  
Smallholder Farmers ◽  
Household Wealth ◽  
Sub Saharan Africa ◽  
Sustainable Land Management ◽  
Short Term ◽  
Plot Size ◽  
Unit Increase ◽  
Farming Households

Abstract Despite increasing land degradation in sub-Saharan Africa, investment in sustainable land management (SLM) remains low. Empirical evidence show that smallholder farmers tend to prioritize investing in SLM practices with short-term turnover—e.g., composting and crop residue integration—in order to improve soil fertility and yields to the neglect of practices like agroforestry whose benefits tend to materialize in a relatively longer period. While it is crucial for farmers to prioritize both short-term and long-term SLM practices for the maintenance of overall ecosystem health, the factors that shape the concurrent adoption of short-term and long-term SLM practices remain underexplored. Using data from a cross-sectional survey with smallholder farming households (n = 512) in Malawi, we employed logistic regression to examine the determinants of the concurrent adoption of short-term and long-term SLM practices. Our findings show that plot size, farmer-to-farmer knowledge sharing, presence of a chronically ill person in the household, active household labor size, wealth and women's autonomy are noteworthy determinants. A unit increase in plot size was associated with increased odds (OR = 1.41, p < 0.01) of simultaneously adopting short-term and long-term SLM practices. Similarly, a unit increase in the active labor size of the household (OR = 1.30, p < 0.001) was positively associated with the concurrent adoption of short-term and long-term SLM practices. Households with no chronically sick person were 3.2 times more likely to adopt short-term and long-term SLM practices simulataneously compared to those with chronically sick persons. Farming households that exchanged farming information (OR = 2.50, p < 0.001) with other households had significantly higher odds of adopting short-term and long-term SLM practices concurrently than those that did not share farming information. Compared to households in the poorest wealth category, those in the richer (OR = 3.14, p < 0.001) and richest (OR = 3.64, p < 0.001) wealth categories were both significantly more likely to adopt short-term and long-term SLM practices concurrently. These findings suggest that initiatives targeted at promoting the holistic adoption of SLM practices—a combination of both short-term and long-term practices—must pay attention to contextual nuances including household wealth, gender, farmer training and land access dynamics.

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